Combined tubular mixer, flow limiting gasket and supporting gasket

Abstract

The utility model relates to a combined type tubular mixer, a flow limiting gasket and a supporting gasket. The mixer comprises a first pipe body and a second pipe body, a second turbulent flow rod is arranged in the second pipe body; a third pipe body; the pipe bodies are sequentially connected in series to form a mixer inner cavity with a smooth inner wall; the flow limiting gasket is arranged between the first pipe body and the second pipe body; a through hole is formed in the flow limiting gasket; the supporting gasket is arranged between the second pipe body and the third pipe body; the supporting gasket comprises a connecting port and a logistics port; the material inlet is formed in one end of the first pipe body; the material outlet is formed in one end of the third pipe body. The technical problem to be solved is how to provide a suitable device for the continuity of diazotization reaction and coupling reaction of solid slurry. The mixer overcomes the defect that a microreactor is easy to block; meanwhile, the flowing track of the fluid is changed, the retention time of the fluid is prolonged, materials are mixed more sufficiently, the reaction is faster, and the reaction yield and the product performance are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical engineering, in particular to a combined tubular mixer, a flow limiting gasket and a supporting gasket. Background Art

[0002] As an emerging field, microchemical technology has been widely used in fine chemicals, polymer chemicals, and pharmaceutical engineering because of its small and compact advantages, which can reduce sample consumption and manufacturing costs. Continuous production technology is an efficient process intensification technology with the advantages of efficient mass and heat transfer, easy scale-up, and safety. It is widely used in the field of fine chemicals, especially in organic synthesis. However, the current production mode in the industry is still mainly intermittent, and there are relatively few continuous processes. This is not only related to the reaction system, reaction characteristics, etc., but also closely related to the core reactor or core micromixer of the continuous process.

[0003] Diazotization and coupling reactions are common reactions in fine chemical organic synthesis, especially in the synthesis of fine chemicals such as medicines, pesticides, dyes and pigments. There have been many reports on the continuous process of diazotization of all-solution materials using micromixers, and some of them have been applied to small and pilot tests. However, the continuous diazotization and coupling reactions involving solid slurries are still in the laboratory stage, mainly because the material passages in the current micromixers or continuous microreactors are too small, and solid slurries are prone to blockage during long-term operation. The most typical is the preparation of azo pigments using diazotization and coupling reactions.

[0004] Azo pigments currently use intermittent processes based on traditional kettle reactors, which have problems such as yields less than 95%, large particle size, and uneven particle size distribution, resulting in batch performance differences in pigments. Although many studies have shown that the continuous process using micro mixers can greatly improve product yields and quality control, the material flow of micro mixers is small, and problems such as diversion in scaled-up production will make control difficult, which in turn causes pipeline blockages. Utility Model Content

[0005] The main purpose of the utility model is to provide a combined tubular mixer and a flow limiting gasket and a supporting gasket. The technical problem to be solved is how to provide a combined tubular mixer, so as to provide a suitable device for the diazotization reaction involving solid slurry and the continuous coupling reaction. The channel in the mixer of the utility model has no dead angle, and it is not easy for particles to settle and accumulate, which overcomes the disadvantage that the microreactor is easy to be blocked; at the same time, the turbulent structure in the channel changes the flow trajectory of the fluid, increases the residence time of the fluid in the mixer, makes the material mixing more sufficient, reacts more rapidly, improves the reaction yield and product performance, and is more practical.

[0006] The purpose of the utility model and the technical problem to be solved are achieved by adopting the following technical solutions. A combined tubular mixer proposed in the utility model comprises:

[0007] A first tube body, wherein a first spoiler bar is disposed in the first tube body; the axis of the first spoiler bar is parallel to the axis of the first tube body;

[0008] a second tube body, wherein a second spoiler rod is arranged in the second tube body; the axis of the second spoiler rod is parallel to the axis of the second tube body; the second spoiler rod comprises spoiler particles; the spoiler particles comprise end spoiler particles arranged at the end of the second spoiler rod; a connecting groove is arranged at one end of the end spoiler particle away from the spoiler rod body;

[0009] A third tube body, wherein the inner diameters of the first tube body, the second tube body and the third tube body match each other, and the three tube bodies are connected in series in sequence to form a mixer inner cavity with a smooth inner wall;

[0010] A current limiting gasket is arranged between the first tube body and the second tube body; a through hole is arranged in the middle position of the current limiting gasket along the axial direction; one end of the first spoiler rod is a column structure; the column structure passes through the through hole and is inserted into the connecting groove; the inner diameter of the through hole is greater than the outer diameter of the column; a continuous annular gap is formed between the through hole and the column structure;

[0011] A support gasket is arranged between the second tube body and the third tube body; the support gasket comprises a connection port and a logistics port; the connection port is arranged in the middle position of the support gasket; the logistics port is arranged around the periphery of the connection port; one end of the second spoiler rod is a column structure; the column structure is inserted into the connection port;

[0012] A material inlet is arranged on an end of the first tube body away from the second tube body;

[0013] The material outlet is arranged on one end of the third tube body away from the second tube body; the material inlet, the inner cavity of the first tube body, the annular gap, the inner cavity of the second tube body, the logistics port, the inner cavity of the third tube body and the material outlet are connected in sequence to form a material channel.

[0014] The purpose of the utility model and the solution to its technical problems can also be further achieved by adopting the following technical measures.

[0015] Preferably, in the aforementioned combined tubular mixer, the flow limiting gasket and the supporting gasket both include a connecting portion; sealing grooves are provided on both sides of the connecting portion that are opposite to each other; flanges are provided at one end of the first tube body, at both ends of the second tube body, and at one end of the third tube body; the connecting portion is provided between two adjacent flanges; a sealing material is provided in the sealing groove; the sealing material contacts the surface of the flange to seal between two adjacent tube bodies.

[0016] Preferably, in the aforementioned combined tubular mixer, the through hole includes a wide opening arranged at both ends and a narrow opening arranged in the through hole; the wide opening extends outward to the connecting portion; the wide opening and the narrow opening are smoothly connected by an arc surface; the arc surface cooperates with the outer surface of the spoiler rod to form an annular gap.

[0017] Preferably, in the aforementioned combined tubular mixer, the connection port of the support gasket is a blind hole; the opening of the connection port is arranged on the upper surface of the support gasket; the upper surface is provided with an annular groove; the outer edge of the annular groove extends toward the connecting portion, and the inner edge extends toward the connection port; the inner surface of the annular groove is a smooth arc surface structure; one end opening of the logistics port is arranged on the inner surface of the annular groove; the total channel area of ​​the annular gap is greater than the total channel area of ​​the logistics port of the support gasket.

[0018] Preferably, the aforementioned combined tubular mixer, wherein the second tube body comprises a plurality of second tube body units connected in series in sequence; a second spoiler rod is arranged in each of the second tube body units; each second spoiler rod comprises spoiler particles; the spoiler particles comprise end spoiler particles arranged at the end of the second spoiler rod; the flow limiting gasket is arranged between two adjacent second tube body units; when two adjacent second spoiler rods are connected, the column structure of one of the second spoiler rods passes through the through hole of the flow limiting gasket and is inserted into the connecting groove of the end spoiler particle of the other second spoiler rod.

[0019] Preferably, in the aforementioned combined tubular mixer, the number of the spoiler particles on the first spoiler rod and the second spoiler rod are both 1 to 4; and the surface of the end spoiler particles arranged at the end of the first spoiler rod is smooth and flat.

[0020] Preferably, in the aforementioned combined tubular mixer, the material inlet comprises a first feed port and a second feed port, which are respectively arranged on opposite sides of the first tube body; the first feed port and the second feed port are arranged upstream of the first spoiler rod.

[0021] Preferably, in the aforementioned combined tubular mixer, the first tube body, the second tube body and the third tube body are all provided with a temperature control medium jacket; the jacket includes a temperature control medium inlet and a temperature control medium outlet; the temperature control medium inlet and the temperature control medium outlet are respectively arranged on two sides opposite to each other at both ends of the tube body.

[0022] Preferably, in the aforementioned combined tubular mixer, the material of the tube body, the spoiler rod, the spoiler rod particles and the gasket are all selected from at least one of glass, stainless steel, alloy, titanium, polytetrafluoroethylene and polyetherketone.

[0023] The purpose of the utility model and the technical problem solved are also achieved by adopting the following technical solutions. According to the utility model, a flow limiting gasket applied to the aforementioned combined tubular mixer is proposed, which includes:

[0024] A gasket body; a through hole is provided on the gasket body; the through hole is provided along the axial direction of the gasket body; the openings at both ends of the through hole are wide mouths; the wide mouths are provided on the upper and lower surfaces of the gasket body; the wide mouths are smoothly connected to the upper and lower surfaces; a constriction is provided at the center of the through hole; the constriction is connected to the wide mouth by a smooth arc surface; the shape and size of the through hole match the shape and size of the spoiler bar; the inner wall of the through hole can cooperate with the outer wall of the spoiler bar to form a through annular gap;

[0025] The connecting portion is arranged around the periphery of the gasket body.

[0026] The purpose of the utility model and the technical problem solved are also achieved by adopting the following technical solutions. A support gasket applied to the aforementioned combined tubular mixer proposed in the utility model comprises:

[0027] A gasket body; a connecting port is provided in the middle position of the gasket body; the connecting port is provided along the axial direction of the gasket body; the opening of the connecting port is opened on the upper surface of the gasket body; an annular groove is also provided on the upper surface of the gasket body; the annular groove is arranged around the periphery of the connecting port; the inner edge and the outer edge of the annular groove are smoothly connected to the upper surface; the inner surface of the annular groove is a smooth arc surface; a logistics port that passes through the upper and lower surfaces of the gasket body is also provided on the gasket body; the logistics port is arranged around the periphery of the connecting port; the upper end opening of the logistics port is arranged on the inner surface of the annular groove, and the lower end opening is arranged on the lower surface of the gasket body; the opening is smoothly connected to the adjacent surface;

[0028] The connecting portion is arranged around the periphery of the gasket body.

[0029] By means of the above technical solution, the combined tubular mixer, flow limiting gasket and support gasket proposed in the utility model have at least the following advantages:

[0030] The combined tubular mixer of the utility model is connected in series in sequence through a first tube body, a flow limiting gasket, a second tube body, a supporting gasket and a third tube body, wherein the radial dimensions of the inner cavity of the first tube body, the inner cavity of the second tube body and the inner cavity of the third tube body are matched to form a mixer inner cavity with a smooth inner wall, forming a material channel including a material inlet, a first tube body inner cavity, an annular gap, a second tube body inner cavity, a logistics port, a third tube body inner cavity and a material outlet; the material channel has no dead angle inside, and it is not easy for particles to settle and accumulate, thereby overcoming the disadvantage that the microreactor is easy to be blocked; and the first tube body and the second tube body of the mixer of the utility model are both provided with a turbulent structure, which changes the flow trajectory of the fluid and increases the residence time of the fluid in the mixer, so that the mixing of the materials is more sufficient, the reaction is more rapid, and the reaction yield and product performance are improved.

[0031] Furthermore, the utility model makes the inner cavity structure of the mixer smoother and the material flows more easily by specially designing the structures of the flow-limiting gasket and the supporting gasket, further avoiding or reducing the sedimentation and accumulation of particles; specifically, the utility model defines that the through hole of the flow-limiting gasket includes a wide mouth arranged at both ends and a constricted mouth arranged in the through hole, the wide mouth extends outward to the connecting portion, and the wide mouth and the constricted mouth are smoothly connected by an arc surface, so that the places on the flow-limiting gasket that can contact the material are all set to a smooth arc surface structure, thereby making the annular gap smoother. By limiting the upper surface to be provided with an annular groove, the outer edge of the annular groove extends toward the connecting portion, the inner edge extends toward the connecting port, and the inner surface of the annular groove is a smooth arc surface structure. These structural combinations make the places on the supporting gasket that can contact the material all set to a smooth arc surface structure, thereby making the material flow through the supporting gasket smoother.

[0032] Furthermore, the utility model limits the total channel area of ​​the annular gap of the flow limiting gasket to be larger than the total channel area of ​​the logistics port of the supporting gasket, so that before the material flows to the third tube body, a local back mixing effect is generated upstream of the supporting gasket, thereby further enhancing the material mixing effect and making the material mixing effect of the device better.

[0033] Furthermore, the second tube body includes a plurality of second tube body units connected in series in sequence, each second tube body unit is provided with a second spoiler rod, and two adjacent second spoiler rods are connected and extended by a current limiting gasket. This structural design allows the mixer to be flexibly superimposed and extended according to the conditions of the reaction system to enhance the heat exchange and mixing effects, thereby adapting to different reaction systems; at the same time, the second tube body unit serves as the smallest channel unit of the mixer, and the second tube body is formed by a combination of detachable second tube body units, so that the second tube body can be conveniently disassembled and cleaned and repaired and replaced regularly.

[0034] Furthermore, when the mixer of the utility model is used to prepare azo pigments in a continuous process, the combined tubular mixer has better mass transfer and heat transfer efficiency, suppresses local overheating, is suitable for larger flow reactions, does not have problems such as flow distribution, and can directly match production needs; the mixing efficiency is improved, the production efficiency is improved, the product yield is high (>98%), the average particle size is small (<10μm), and the pigment has a higher brightness (ΔC>2) than commercially available pigments.

[0035] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the combined tubular mixer proposed by the utility model;

[0037] Figure 2 It is a schematic diagram of the cross-sectional structure of the current limiting gasket in the mixer of the utility model along its axis;

[0038] Figure 2a It is a schematic diagram of the structure of the current limiting gasket in the mixer of the utility model - top view / top view;

[0039] Figure 3 It is a schematic diagram of the cross-sectional structure of the support gasket in the mixer of the utility model along its axis;

[0040] Figure 3a It is a structural schematic diagram of the support gasket in the mixer of the utility model - front view;

[0041] Figure 3b It is a schematic diagram of the structure of the support gasket in the mixer of the utility model - top view;

[0042] Figure 4 It is a structural schematic diagram of the first spoiler rod in the mixer of the utility model;

[0043] Figure 5 It is a structural schematic diagram of the second spoiler rod in the mixer of the utility model. DETAILED DESCRIPTION

[0044] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation, structure, features and effects of the combined tubular mixer, flow limiting gasket and support gasket proposed by the utility model are described in detail below in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0045] The utility model provides a combined tubular mixer, as shown in the attached Figure 1 To Attachment Figure 5As shown, it includes: a first tube body 1, also called a material inlet body, which is mainly used for feeding materials; the internal cavity of the first tube body is a first tube cavity 11; a first spoiler rod 12 is arranged in the first tube cavity, and the axis of the first spoiler rod is parallel to the axis of the first tube cavity; a material channel is formed between the inner wall of the first tube cavity and the outer wall of the first spoiler rod; the channel area of ​​the material channel in different radial cross sections is different, so that disturbance is formed when the material passes through, thereby enhancing the mixing effect of the material; the utility model mixer also includes a second tube body 2, also called a mixing cylinder, which is arranged downstream of the first tube body and is mainly used for mixing and reacting materials; the second tube body includes a second tube cavity 21; a second spoiler rod 22 is arranged in the second tube cavity, and the axis of the second spoiler rod The line is parallel to the axis of the second tube cavity; a material channel is formed between the inner wall of the second tube cavity and the outer wall of the second spoiler rod; the channel area of ​​the material channel in different radial cross sections is different, so that disturbance is formed when the material passes through, thereby enhancing the mixing effect of the material; the second spoiler rod includes spoiler particles; the spoiler particles include end spoiler particles 221 arranged at the end of the second spoiler rod, and conventional spoiler particles 222 not arranged at the end; a connecting groove 2211 is arranged at the end of the end spoiler particle away from the spoiler rod body; the connecting groove is used for connecting spoiler rods, so as to facilitate connecting and extending multiple spoiler rods into a spoiler rod with a longer length, thereby realizing effective material mixing and reaction in a longer mixing cylinder; the specific structure of the connecting groove can be The connection is made by adopting conventional mechanical connection methods in the field, for example, snap connection, screw connection, which is not specifically limited in the utility model, as long as the fixed connection between the two spoiler bars can be achieved to achieve the purpose of extending them; the mixer of the utility model also includes a third tube body 3, also called a material receiving body, which is arranged downstream of the second tube body and is mainly used for discharging materials; the internal cavity of the third tube body is a third tube cavity 31; the third tube cavity is only used for the material discharging channel, and no spoiler bar is arranged inside; the inner diameters of the first tube cavity, the second tube cavity and the third tube cavity mentioned above are matched, and are connected in series in sequence to form a mixer cavity with a smooth inner wall; the mixer of the utility model also includes a flow limiting gasket 4; the flow limiting gasket is arranged between the first tube body and the second tube body, on the one hand, it is used not to The connection seal between the same pipe body; on the other hand, the flow limiting gasket is also provided with a specific structure so that it can change the channel area in the radial cross section, and the flow of the fluid is disturbed by the change of the shape and size of the material channel, thereby enhancing the mixing effect of the material; specifically, a through hole 42 is provided in the middle position of the flow limiting gasket along the axial direction; one end of the first spoiler rod is a columnar structure 123; the columnar structure is inserted into the connecting groove through the through hole; the inner diameter of the through hole is larger than the outer diameter of the column, so that a through annular gap is formed between the through hole and the columnar structure, thereby ensuring that the material can pass smoothly; the mixer of the utility model also includes a support gasket 5; the support gasket is arranged between the second pipe body and the third pipe body, and on the one hand, it is used for the connection seal between different pipe bodies;On the other hand, the support gasket is also provided with a specific structure so that it can change the channel area in the radial cross section, and cause disturbance to the flow of the fluid by changing the shape and size of the material channel, thereby enhancing the mixing effect of the material; specifically, the support gasket includes a connecting port 52 and a logistics port 53; the connecting port is arranged in the middle position of the support gasket, and is used for the fixed connection of the second spoiler rod; the connecting port can accurately determine the relative position of each spoiler rod relative to the inner cavity of the mixer, so that the spoiler rod can be accurately positioned; the logistics port is arranged around the periphery of the connecting port, and is used for the material to flow between different pipe bodies; the logistics port can accurately control the cross-sectional area of ​​the material channel on the gasket, thereby controlling the logistics Disturbance degree; one end of the second spoiler rod is a column structure 223, which is plugged into the connection port; the utility model mixer also includes a material inlet 15, which is arranged on the end of the first tube body away from the second tube body, for feeding the material; the utility model mixer also includes a material outlet 32, which is arranged on the end of the third tube body away from the second tube body, for discharging the material; the material inlet, the first tube cavity, the annular gap, the second tube cavity, the logistics port, the third tube cavity and the material outlet are connected in sequence to form a material channel; the material to be mixed enters the material channel from the logistics inlet, mixes and reacts in the material channel, and finally discharges from the logistics outlet. ;

[0046] In a specific embodiment of the present utility model, the flow limiting gasket includes a connecting portion 41; the connecting portion is annularly arranged at the peripheral edge of the flow limiting gasket; sealing grooves 411 are arranged on both sides of the connecting portion that are relatively arranged; the supporting gasket includes a connecting portion 51; the connecting portion is annularly arranged at the peripheral edge of the supporting gasket; sealing grooves 511 are arranged on both sides of the connecting portion that are relatively arranged; a flange 14 is arranged at one end of the first tube body; flanges 24 are arranged at both ends of the second tube body; a flange 34 is arranged at one end of the third tube body; the connecting portion is arranged between two adjacent flanges; a sealing material is arranged in each sealing groove of the gasket; the sealing material tightly contacts the flange surface to seal the two adjacent tube bodies to prevent material leakage.

[0047] In a specific embodiment of the present invention, the through hole of the current limiting gasket includes a wide opening arranged at both ends and a constricted opening arranged in the through hole, that is, the inner cavity structure of the through hole is an "8"-shaped structure with a small inner diameter in the middle and a large inner diameter at the openings at both ends; the wide opening extends outward to the connecting portion, and the wide opening and the constricted opening are smoothly connected by an arc surface; this structural setting makes the structure on the current limiting gasket except the connecting portion a smooth arc surface structure 43, which can greatly reduce the dead angle of the channel here, thereby avoiding or reducing the precipitation and accumulation of materials; the arc surface cooperates with the outer surface of the spoiler rod to form an annular gap as a channel for the material to pass through here.

[0048] In a specific embodiment of the present invention, the connection port of the support gasket is a blind hole, and the opening of the connection port is arranged on the upper surface of the support gasket, the main purpose of which is to fix and connect the second spoiler rod; the setting of the blind hole structure can make the second spoiler rod smoothly connected on the one hand, and on the other hand, it can avoid the formation of unnecessary structure in the material channel, which increases the risk of unnecessary material precipitation and accumulation; the upper surface of the support gasket is also provided with an annular groove 54; the annular groove is arranged around the periphery of the connection port; the outer edge of the annular groove extends toward the connecting part, and the inner edge extends toward the connection port, and the inner surface of the annular groove is a smooth arc surface structure; the logistics port is arranged in the annular groove, and the logistics port One end opening is arranged on the lower surface of the supporting gasket, and the other end opening is arranged on the inner surface of the annular groove; this structural arrangement makes the structures on the supporting gasket except the connecting part and the connecting port all smooth arc surface structures, which can greatly reduce the dead angle of the channel here, thereby avoiding or reducing the sedimentation and accumulation of materials; further, the total channel area of ​​the annular gap of the flow limiting gasket is larger than the total channel area of ​​the logistics port of the supporting gasket. This structural arrangement can make the material of the supporting gasket appropriately obstructed when passing through, and the arc surface design of the annular groove and the change of the channel area work together to make the fluid produce a local back mixing effect at this location, thereby further enhancing the mixing effect of the material.

[0049] In a specific embodiment of the utility model, the second tube body includes a plurality of second tube body units 20 connected in series in sequence; a second spoiler rod is arranged in each second tube body unit; each second spoiler rod includes spoiler particles; the spoiler particles include end spoiler particles arranged at the end of the second spoiler rod; a limiting flow gasket is arranged between two adjacent second tube body units; when two adjacent second spoiler rods are connected, the column structure of one second spoiler rod passes through the through hole of the limiting flow gasket and is plugged into the connecting groove of the end spoiler particle of the other second spoiler rod; at the same time, the connecting part of the limiting flow gasket is connected to the adjacent flange. When the second tube body is composed of a plurality of second tube body units, the spoiler rod combined in the second tube body can extend to a very long length, and can also include a large number of spoiler particles. The lengthened second tube body after this combination can make the material more fully mixed and reacted, thereby expanding the scope of application scenarios of the device.

[0050] In a specific embodiment of the utility model, the number of spoiler particles on the first spoiler rod and the second spoiler rod is 1 to 4, and the number setting can be determined according to the application scenario; the shape of the spoiler particles is spherical, ellipsoidal, heart-shaped or inclined plate-shaped, and the utility model does not make specific limitations on it, as long as it can achieve its spoiler function and does not increase the structural dead corners of the logistics channel.

[0051] In a specific embodiment of the present invention, the preferred spoiler particles are spherical particles with a smooth surface, so that the interior of the material channel is smooth and flat without dead corners, so as to avoid material accumulation and sedimentation; the first spoiler rod also includes conventional spoiler particles 122, which is the same as the conventional spoiler particles of the second spoiler rod; unlike the end spoiler particles of the second spoiler rod, although the first spoiler rod also includes end spoiler particles 121, the surface of the end spoiler particles is smooth and flat, and no connecting groove connection part is set, so that the material channel of the mixer can be smooth and flat, thereby further reducing the chance of material particle deposition.

[0052] In a specific embodiment of the present invention, the material inlet includes a first feed port and a second feed port, which are respectively arranged on opposite sides of the first tube body; this structural setting can disperse the material feeding position, so that the material enters the first tube body more evenly and is therefore easier to mix.

[0053] In a specific embodiment of the utility model, the combined tubular mixer is particularly suitable for a micro mixer; specifically, the inner diameters of the first feed port and the second feed port are 1 to 20 mm; the straight tube structure of the first tube cavity, the second tube cavity and the third tube cavity is cylindrical, and its inner diameter is 20 to 100 mm; the inner diameter of the material outlet is 2 to 60 mm.

[0054] In a specific embodiment of the present invention, in order to better mix the materials, the present invention limits the inner diameter of the material outlet to be larger than the inner diameters of the first feed port and the second feed port; the ratio of the radial maximum cross-sectional area of ​​the turbulent particles to the inner cavity area of ​​the radial cross-section of the tube cavity is ≥0.5.

[0055] In a specific embodiment of the present invention, the first feed port and the second feed port are arranged upstream of the first spoiler rod. This structural arrangement can enable certain turbulent mixing of materials in the first tube body after feeding, thereby further improving the mixing effect of the materials.

[0056] In a specific embodiment of the utility model, the first tube body is provided with a temperature control medium jacket 13, which includes a temperature control medium inlet 131 and a temperature control medium outlet 132; the second tube body is provided with a temperature control medium jacket 23, which includes a temperature control medium inlet 231 and a temperature control medium outlet 232; the third tube body is provided with a temperature control medium jacket 33, which includes a temperature control medium inlet 331 and a temperature control medium outlet 332; the temperature control medium inlet and the temperature control medium outlet are respectively arranged at both ends of the corresponding tube body and on both sides opposite to each other, so that the temperature control effect is better, making it more suitable for mixing and reaction under various temperature conditions.

[0057] In a specific embodiment of the present invention, the material of the first tube body, the second tube body, the third tube body, the first spoiler rod, the second spoiler rod, the spoiler rod particles and various gaskets are all selected from at least one of glass, stainless steel, alloy, titanium, polytetrafluoroethylene and polyetherketone.

[0058] The utility model also proposes a flow limiting gasket applied to the aforementioned combined tubular mixer, as shown in the attached Figure 2 And attached Figure 2a As shown, it includes:

[0059] Gasket body; the shape and size of the gasket body match the shape and size of the tube cavity, so that the inner wall of the inner cavity after the combination is smooth and flat, and dead angles are not easy to occur; a through hole is provided on the gasket body; the through hole is arranged along the axial direction of the gasket body; in a specific embodiment, the axis of the through hole is parallel to the axis of the gasket body; the gasket body is an axisymmetric structure; the axis of the through hole coincides with the axis of the gasket body; the openings at both ends of the through hole are wide mouths; the wide mouth is opened on the upper and lower surfaces of the gasket body; the wide mouth and the upper and lower surfaces are smoothly connected to avoid sharp corners at the junction of the two that affect the flow of materials; a necking is provided in the center of the through hole; in a specific embodiment, the necking is parallel to the wide mouth and both are circular, and the difference between the two is that the inner diameter of the necking is smaller than the inner diameter of the wide mouth; the necking position is located in the middle of the two wide mouths , so that the flow-limiting gasket has symmetrical upper and lower structures along the radial cross-section where the necking is located, so that there is no need to distinguish its upper and lower directions during specific use, and the operation is simple and convenient; the connecting surface between the necking and the wide mouth is a smooth arc connection, so that there will be no or fewer dead corners when the material flows through the flow-limiting gasket; in a specific embodiment, the arc surface is a partial spherical surface concave from the wide mouth to the necking; the shape and size of the through hole match the shape and size of the spoiler rod, so that the inner wall of the through hole can cooperate with the outer wall of the spoiler rod to form a through annular gap, thereby realizing its flow limiting function, and by changing the radial cross-sectional area at different positions in the material channel, the material generates turbulence in the channel, so that the material is mixed more evenly; the flow-limiting gasket also includes a connecting portion, which is surrounded by the periphery of the gasket body; the connecting portion has two surfaces arranged opposite to each other, which are used to be sealed and connected with the adjacent pipe body flange.

[0060] The utility model also proposes a support gasket for the aforementioned combined tubular mixer, as shown in the attached Figure 3 , Attachment Figure 3a And attached Figure 3b As shown, it includes:

[0061] Gasket body; the shape and size of the gasket body match the shape and size of the tube cavity, so that the inner wall of the inner cavity after the combination is smooth and flat, and it is not easy to produce dead angles; a connecting port 52 is arranged in the middle position of the gasket body; the connecting port is used to determine the relative position of the second spoiler rod and fix the second spoiler rod; the connecting port is arranged along the axial direction of the gasket body; the opening of the connecting port is opened on the upper surface of the gasket body; the upper surface of the gasket body is also provided with an annular groove 54; the annular groove is arranged around the periphery of the connecting port; the inner surface of the annular groove is a smooth arc surface; the gasket body is also provided with a logistics port 53 that passes through the upper and lower surfaces of the gasket body; the logistics port is arranged around the connecting port the periphery of the logistics port; the upper end opening of the logistics port is arranged on the inner surface of the annular groove, and the lower end opening is arranged on the lower surface of the gasket body; in the supporting gasket, the opening and the adjacent surface are smoothly connected, and the inner edge and the outer edge of the annular groove are smoothly connected to the upper surface. This structural setting is intended to minimize the material dead angle that may be generated by the supporting gasket; at the same time, by controlling the channel area of ​​the logistics port and the annular groove on the upper surface of the gasket, local back mixing will occur when the material flows through the supporting gasket, thereby further providing a material mixing effect; the supporting gasket also includes a connecting portion, which is surrounded by the periphery of the gasket body; the connecting portion has two surfaces arranged opposite to each other, which are used to be sealed and connected to the adjacent pipe body flange.

[0062] The utility model will be further described below in conjunction with specific embodiments, but this should not be construed as limiting the scope of protection of the utility model. Some non-essential improvements and adjustments made to the utility model by technicians in this field based on the contents of the utility model above still fall within the scope of protection of the utility model.

[0063] Unless otherwise specified, the materials, reagents, etc. involved below are all commercially available products well known to those skilled in the art; unless otherwise specified, the methods described are all methods well known in the art. Unless otherwise defined, the technical terms or scientific terms used should have the common meanings understood by ordinary technicians in the field to which the utility model belongs.

[0064] Example 1

[0065] The second tube body in the combined tubular mixer of this embodiment includes two second tube body units, and the specific structure is as follows:

[0066] A vertical combined tubular micro mixer comprises, from top to bottom, a first tube body, a second tube body (including two second tube body units) and a third tube body.

[0067] The bottom of the first tube body is connected to the top of a second tube body unit in the form of a flange; wherein the flanges are coaxially tightly connected by a flange flow limiting gasket seal; a through hole is set in the middle of the flange flow limiting gasket. The first tube body is provided with a first feed port and a second feed port at positions opposite to each other at the top, the distance between the ports of the two feed ports is 110mm, and the inner diameters of the two feed ports are both 6mm. The barrel shape of the first tube body is composed of an upper hemispherical structure and a lower straight tube structure, the inner diameters of the hemisphere and the straight tube are both 35mm, and the height of the straight tube structure is 70mm. The first tube body is provided with a jacket, and a temperature control medium inlet and a temperature control medium outlet are provided at upper and lower relative positions.

[0068] The second tube unit has a height of 80 mm and an inner diameter of 35 mm. It is also provided with a jacket, and a temperature control medium inlet and a temperature control medium outlet are provided at upper and lower relative positions. The bottom of the second tube unit at the top is connected to the top of the second tube unit at the bottom in the form of a flange; wherein the flanges are coaxially tightly connected by a flange flow limiting gasket seal; and a through hole is provided on the flange flow limiting gasket.

[0069] The top of the third tube body is connected to the bottom of the second tube body unit below by a flange; wherein the flanges are coaxially tightly connected by a flange support gasket seal. Four logistics ports are arranged on the flange support gasket, and the logistics ports are circular channels with an inner diameter of 6 mm. The barrel shape of the third tube body is composed of an upper part of a straight tube structure and a lower part of a hemispherical structure. The inner diameter of the straight tube and the inner diameter of the hemispherical structure are both 35 mm, and the height of the straight tube structure is 30 mm. A material outlet is arranged at the center of the bottom, and the inner diameter of the material outlet is 12 mm and the height is 15 mm. The third tube body is provided with a jacket, and a temperature control medium inlet and a temperature control medium outlet are respectively arranged at upper and lower relative positions.

[0070] A second spoiler bar extending to the second tube unit is fixedly connected in the connecting port at the center of the flange support gasket; the length of each second spoiler bar is 84mm, and two spherical spoiler particles are provided, and the diameter of each spoiler particle is 33mm, and the top of the second spoiler bar is an end spoiler particle, and its center is provided with a connecting groove that can connect another second spoiler bar or the first spoiler bar. The length of the first spoiler bar is 80mm, and two spherical spoiler particles are provided, and the diameter of each spoiler particle is 33mm, and the end spoiler particles at the top of the first spoiler bar are smooth and have no interface; the second spoiler bar on the top passes through the through hole of the flange current limiting gasket, so that the column structure of the first spoiler bar is fixedly connected to the connecting groove of the second spoiler bar, and the column structure of the second spoiler bar is fixedly connected to the connecting groove of the second spoiler bar on the bottom.

[0071] The diameter of the gasket body in the above-mentioned current limiting gasket and supporting gasket is 35 mm, and the thickness of the connecting part is 10 mm.

[0072] The first feed port and the second feed port are located higher than the top of the first spoiler bar.

[0073] The first tube body, the second tube body and the third tube body are all made of glass material, the flange current limiting gasket and the flange supporting gasket are all made of polytetrafluoroethylene material, and the first spoiler rod, the second spoiler rod and the spoiler particles are all made of polyetheretherketone material.

[0074] The pigment red 146 compound was prepared by continuous method using the mixer of this embodiment to verify its process effect. The specific steps are as follows:

[0075] 8 L of ice water, 300 ml of 37% concentrated hydrochloric acid and 254.7 g of 3-amino-4-methoxy-N-phenylbenzamide (red base KD) were added to a 20 L plastic bucket in sequence. Water was added to make the total volume of the suspension 10 L, and the mixture was beaten for 60 min to obtain a 3-amino-4-methoxy-N-phenylbenzamide slurry, which was then cooled to 0°C.

[0076] Add 8 L of ice water and 123.5 g of sodium nitrite to a 20 L plastic barrel, stir until completely dissolved, dilute with water to a total volume of 10 L to prepare a sodium nitrite solution, and cool to 0°C.

[0077] Above-mentioned 3-amino-4-methoxy-N-phenylbenzamide slurry and sodium nitrite solution are transferred to two storage tanks respectively, use the metering pump of calibration, the flow of regulating 3-amino-4-methoxy-N-phenylbenzamide slurry and sodium nitrite solution is 120L / h, two kinds of reactants are pumped to the combined tubular mixer of the present embodiment, and the front 200mL reaction mixture is discarded.The mixed solution is subsequently collected in the plastic bucket of 20L, and the reaction mixture is stirred for 5min again, urea 50g is added, and excessive sodium nitrite is removed, and suction filtration obtains 3-amino-4-methoxy-N-phenylbenzamide diazonium salt solution, and stands for use.

[0078] In a 20L beaker, add 188.4g of N-(4-chloro-2,5-dimethoxyphenyl)-3-hydroxy-2-naphthamide (Naphthophenol AS-LC), 8L of water and 54.5g of sodium hydroxide, stir for 0.5h, the coupler is completely dissolved, lower the temperature to 5°C, and obtain a suspension of N-(4-chloro-2,5-dimethoxyphenyl)-3-hydroxy-2-naphthamide. Finally, dilute with water to a total volume of 10L to obtain a coupler slurry.

[0079] The 3-amino-4-methoxy-N-phenylbenzamide diazonium salt solution and the coupling agent slurry were transferred to two storage tanks respectively, and the flow rates of the diazonium salt solution and the coupling agent slurry were adjusted to 120 L / h using a calibrated metering pump, and the two reactants were pumped into the combined tubular mixer of this embodiment, and the first 100 mL of the reaction mixture was discarded. The subsequent mixed solution was collected in a plastic barrel to obtain an azo pigment suspension.

[0080] The pigmentation step of the azo pigment suspension is to transfer the reaction mixture to a glass reactor, heat it to 85°C and keep it warm for 2 hours to obtain the pigmented azo pigment suspension. Then cool it to room temperature, filter the reaction product, wash it with deionized water until the pH of the filtrate is neutral, and dry it at 75°C for 8 hours to obtain Pigment Red 146 compound (Permanent Carmine FBB), with a yield of 98.43%, an average particle size D50 of 7.65μm, and ΔC=2.36. Among them, the particle size analysis of the pigment adopts BT-9300ST laser particle size distribution analyzer (Dandong Better Instrument Co., Ltd.); the color performance of the pigment adopts CS-10 colorimeter (Hangzhou Color Spectrum Technology Co., Ltd.) based on the commercially available standard, and CIE-L*a*b* space color coordinate method. ΔC represents the difference in brightness or saturation (ΔC=C sample-C standard), and ΔC>0 means that the brightness is higher than the standard sample, and ΔC<0 means that it is not as bright as the standard sample.

[0081] Comparative Example 1:

[0082] Preparation of Pigment Red 146 by batch process:

[0083] 16.4 g of 3-amino-4-methoxy-N-phenylbenzamide (red base KD) was added to 200 mL of water and 30 mL of (36%) hydrochloric acid, stirred to dissolve, cooled in an ice bath to below 5° C., 20% sodium nitrite solution was added to carry out diazotization reaction, and the reaction was continued for 30 min. After diazotization, sodium acetate was added to the diazo solution to adjust the pH of the diazo solution to 4, and filtered to obtain a 3-amino-4-methoxy-N-phenylbenzamide diazonium salt solution.

[0084] Add 7.1g of sodium hydroxide to 400mL of water, stir for 0.5h, dissolve the color phenol AS-LC (25.5g), after the complete dissolution, add the coupling component of the constant pressure dropping funnel to the diazo solution to the coupling component, add the solution for 30min, react for 1h, heat to 80℃, keep warm for 2h, filter, the pH value after coupling is 5, and obtain the azo pigment suspension. Heat the reaction mixture to 85℃ and keep warm for 2h to obtain the pigmented azo pigment suspension. Then cool to room temperature, filter the reaction product, wash with deionized water until the pH of the filtrate is neutral, and dry at 75℃ for 8h to obtain the pigment red 146 compound with a yield of 94.56%, an average particle size D50 of 19.75μm, and ΔC=1.31.

[0085] Example 2

[0086] The same as the first embodiment, but different in that the second tube body of the combined tubular mixer of the present embodiment includes three second tube body units.

[0087] The mixer of this embodiment is used to continuously prepare the pigment yellow 12 compound (benzidine yellow G, CI Pigment Yellow 12) to verify its process effect. The specific steps are as follows:

[0088] In a 20L plastic bucket, add 10L ice water, 1.4L 37% concentrated hydrochloric acid and 1050g 3,3'-dichlorobenzidine hydrochloride (DCB hydrochloride) in sequence. Add water to make the total volume of the suspension 15L, beat for 60 minutes to obtain 3,3'-dichlorobenzidine slurry, and cool to 0°C.

[0089] Add 10 L of ice water and 550 g of sodium nitrite to a 20 L plastic bucket, stir until completely dissolved, dilute with water to a total volume of 15 L to prepare a sodium nitrite solution, and cool to 0°C.

[0090] The above 3,3'-dichlorobenzidine slurry and sodium nitrite solution were transferred to two storage tanks respectively, and the flow rates of 3,3'-dichlorobenzidine slurry and sodium nitrite solution were adjusted to 120L / h using a calibrated metering pump, and the two reactants were pumped into a combined micro mixer, and the first 200mL of the reaction mixture was discarded. The subsequent mixed solution was collected in a plastic bucket, and the reaction mixture was stirred for another 5min, 50g of urea was added to remove excess sodium nitrite, and suction was filtered to obtain a 3,3'-dichlorobenzidine diazonium salt solution, which was left to stand for use.

[0091] Add 800g of acetoacetanilide, 12L of water and 190g of sodium hydroxide into a 20L plastic barrel and stir for 0.5h. The coupling agent is completely dissolved. The temperature is lowered to 5°C. Acetic acid is slowly added dropwise to the coupling agent solution for acid precipitation to obtain a fine-grained acetoacetanilide suspension. The solution is diluted with water to a total volume of 15L to obtain a coupling agent slurry.

[0092] The 3,3'-dichlorobenzidine diazonium salt solution and the coupling agent slurry were transferred to two storage tanks respectively, and the flow rates of the diazo component solution and the coupling agent slurry were adjusted to 120 L / h using a calibrated metering pump, and the two reactants were pumped into the combined tubular mixer of this embodiment, and the first 200 mL of the reaction mixture was discarded. The subsequent mixed solution was collected in a 20 L plastic barrel to obtain an azo pigment suspension.

[0093] The pigmentation step of the azo pigment suspension is to heat the reaction mixture to 80°C for 2 hours to obtain the pigmented azo pigment suspension. Then, the reaction product is filtered by suction, washed with deionized water until the pH of the filtrate is neutral, and dried at 75°C for 8 hours to obtain a pigment yellow 12 compound (benzidine yellow G, CI Pigment Yellow 12) with a yield of 98.63%, an average particle size D50 of 7.81 μm, and ΔC=3.75. The pigment particle size and performance analysis method are the same as in Example 1.

[0094] Comparative Example 2:

[0095] Preparation of Pigment Yellow 12 by Batch Process

[0096] Add 50 mL of water and 4.00 mL of 36% HCl to a 500 mL beaker, add 2.5 g of DCB and slurry at room temperature for 1 hour under mechanical stirring at a speed of 400 r / min. Cool to below 5°C in an ice bath, add 20% sodium nitrite solution for diazotization reaction, and continue the reaction for 30 minutes. Filter by suction to obtain a 3,3'-dichlorobenzidine diazonium salt solution.

[0097] Add 2.610g NaOH and 150mL water to a 500mL beaker. After the NaOH is completely dissolved, add 9.1g acetoacetanilide and stir for 0.5h until the coupling agent is completely dissolved. Lower the temperature to 5°C, slowly drop acetic acid into the coupling agent solution for acid precipitation to obtain a fine-grained acetoacetanilide suspension, add sodium acetate solution to adjust the solution pH to 6.0, use a constant pressure dropping funnel to add the diazo solution to the coupling component, dropwise add for 20 minutes, and react for 1h. Heat the reaction mixture to 80°C for 2h, then cool to room temperature, filter, wash with deionized water until the filtrate pH is neutral, and dry at 75°C for 8h to obtain Pigment Yellow 12 compound with a yield of 95.01%, an average particle size D50 of 26.79μm, and ΔC=-1.15.

[0098] Table 1 Test results

[0099]

[0100] It can be seen from the above test data that the use of the mixer of the utility model for continuous production can have a higher specific surface area, and therefore has a larger heat transfer coefficient, which greatly improves the heat transfer efficiency of the reaction and suppresses local overheating. At the same time, the high mass transfer efficiency increases the effective utilization rate of atoms and reduces the use of raw materials. At the same time, the mixing and reaction process is carried out continuously, and the composition of any point in the whole system does not change with time, the probability of side reactions is reduced, and the product yield is high. Continuous feeding and continuous discharging, the pigment particles generated first will not aggregate with the pigments generated later, and a product with a small average particle size is obtained. The color performance of organic pigments is related to their particle size and distribution. In the continuous process, the uniform reaction conditions enable it to generate pigments with a more uniform particle size distribution, and a pigment with higher brightness can be obtained.

[0101] The technical features in the claims and / or the specification of the utility model can be combined, and the combination is not limited to the combination obtained by reference in the claims. The technical solution obtained by combining the technical features in the claims and / or the specification is also within the protection scope of the utility model.

[0102] The above is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A combined tubular mixer, characterized in that: It includes: A first tube body, wherein a first spoiler rod is disposed in the first tube body; The axis of the first spoiler bar is parallel to the axis of the first tube body; a second tube body, wherein a second spoiler rod is arranged in the second tube body; the axis of the second spoiler rod is parallel to the axis of the second tube body; the second spoiler rod comprises spoiler particles; the spoiler particles comprise end spoiler particles arranged at the end of the second spoiler rod; a connecting groove is arranged at one end of the end spoiler particle away from the spoiler rod body; A third tube body, wherein the inner diameters of the first tube body, the second tube body and the third tube body match each other, and the three tube bodies are connected in series in sequence to form a mixer inner cavity with a smooth inner wall; A current limiting gasket is arranged between the first tube body and the second tube body; a through hole is arranged in the middle position of the current limiting gasket along the axial direction; one end of the first spoiler rod is a column structure; the column structure passes through the through hole and is inserted into the connecting groove; the inner diameter of the through hole is greater than the outer diameter of the column; a continuous annular gap is formed between the through hole and the column structure; A support gasket is arranged between the second tube body and the third tube body; the support gasket comprises a connection port and a logistics port; the connection port is arranged at the middle position of the support gasket; the logistics port is arranged around the periphery of the connection port; One end of the second spoiler rod is a column structure; the column structure is plugged into the connecting port; A material inlet is arranged on an end of the first tube body away from the second tube body; The material outlet is arranged on one end of the third tube body away from the second tube body; the material inlet, the inner cavity of the first tube body, the annular gap, the inner cavity of the second tube body, the logistics port, the inner cavity of the third tube body and the material outlet are connected in sequence to form a material channel.

2. The combined tubular mixer according to claim 1, characterized in that: The flow limiting gasket and the supporting gasket both include a connecting portion; sealing grooves are provided on both sides of the connecting portion that are opposite to each other; flanges are provided at one end of the first tube body, at both ends of the second tube body, and at one end of the third tube body; the connecting portion is provided between two adjacent flanges; sealing material is provided in the sealing groove; the sealing material contacts the flange surface to seal between the two adjacent tube bodies.

3. The combined tubular mixer according to claim 2, characterized in that: The through hole includes wide openings at both ends and a narrow opening inside the through hole; the wide opening extends outward to the connecting portion; the wide opening and the narrow opening are smoothly connected by an arc surface; the arc surface cooperates with the outer surface of the spoiler rod to form an annular gap.

4. The combined tubular mixer according to claim 2, characterized in that: The connection port of the support gasket is a blind hole; the opening of the connection port is arranged on the upper surface of the support gasket; an annular groove is arranged on the upper surface; the outer edge of the annular groove extends toward the connecting portion, and the inner edge extends toward the connection port; the inner surface of the annular groove is a smooth arc surface structure; one end opening of the logistics port is arranged on the inner surface of the annular groove; the total channel area of ​​the annular gap is greater than the total channel area of ​​the logistics port of the support gasket.

5. The combined tubular mixer according to claim 1, characterized in that: The second tube body includes a plurality of second tube body units connected in series in sequence; a second spoiler rod is arranged in each of the second tube body units; each second spoiler rod includes spoiler particles; the flow limiting gasket is arranged between two adjacent second tube body units; when two adjacent second spoiler rods are connected, the column structure of one of the second spoiler rods passes through the through hole of the flow limiting gasket and is inserted into the connecting groove of the end spoiler particle of the other second spoiler rod.

6. The combined tubular mixer according to claim 3, characterized in that: The number of the spoiler particles on the first spoiler rod and the second spoiler rod are both 1 to 4; the surface of the end spoiler particles arranged at the end of the first spoiler rod is smooth and flat.

7. The combined tubular mixer according to claim 1, characterized in that: The material inlet comprises a first feed port and a second feed port, which are respectively arranged on two opposite sides of the first tube body; the first feed port and the second feed port are arranged upstream of the first spoiler rod.

8. The combined tubular mixer according to claim 1, characterized in that: The material of the tube body, the spoiler rod, the spoiler rod particles and the gasket is selected from at least one of glass, stainless steel, alloy, titanium, polytetrafluoroethylene and polyetherketone.

9. A flow limiting gasket, applied to the combined tubular mixer according to any one of claims 1 to 8, characterized in that: It includes: A gasket body; a through hole is provided on the gasket body; the through hole is provided along the axial direction of the gasket body; the openings at both ends of the through hole are wide mouths; the wide mouths are provided on the upper and lower surfaces of the gasket body; the wide mouths are smoothly connected to the upper and lower surfaces; a constriction is provided at the center of the through hole; the constriction is connected to the wide mouth by a smooth arc surface; the shape and size of the through hole match the shape and size of the spoiler bar; the inner wall of the through hole can cooperate with the outer wall of the spoiler bar to form a through annular gap; The connecting portion is arranged around the periphery of the gasket body.

10. A support gasket, used in the combined tubular mixer according to any one of claims 1 to 8, characterized in that: It includes: A gasket body; a connecting port is provided in the middle of the gasket body; The connecting port is arranged along the axial direction of the gasket body; the opening of the connecting port is opened on the upper surface of the gasket body; the upper surface of the gasket body is also provided with an annular groove; the annular groove is arranged around the periphery of the connecting port; the inner edge and the outer edge of the annular groove are smoothly connected to the upper surface; the inner surface of the annular groove is a smooth arc surface; the gasket body is also provided with a logistics port that passes through the upper and lower surfaces of the gasket body; the logistics port is arranged around the periphery of the connecting port; the upper end opening of the logistics port is arranged on the inner surface of the annular groove, and the lower end opening is arranged on the lower surface of the gasket body; the opening is smoothly connected to the adjacent surface; The connecting portion is arranged around the periphery of the gasket body.

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